CN116118528A - Vehicle power management system - Google Patents
Vehicle power management system Download PDFInfo
- Publication number
- CN116118528A CN116118528A CN202310084390.4A CN202310084390A CN116118528A CN 116118528 A CN116118528 A CN 116118528A CN 202310084390 A CN202310084390 A CN 202310084390A CN 116118528 A CN116118528 A CN 116118528A
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- CN
- China
- Prior art keywords
- battery pack
- bms2
- power supply
- switching controller
- bms1
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The patent discloses a vehicle power management system belongs to power management technical field. The battery pack comprises a power supply switching controller, a battery pack 1, a battery pack 2, BMS1, BMS2 and an external charging and discharging circuit; during the discharge switching control of the battery pack 1 and the battery pack 2: BMS1 and BMS2 are simultaneously powered on, control group battery 1 discharges, and when the power switching controller detects group battery 1 electric quantity and is too little, switch to group battery 2 and begin discharging, group battery 1 stops discharging. The automatic switching of the two groups of batteries is realized, when the electric quantity of one battery is insufficient, the system is actively switched to the other group of batteries for power supply, and the automatic switching device is reliable and convenient.
Description
Technical Field
The invention relates to the technical field of power management, in particular to a vehicle power management system.
Background
At present, the single-cell capacity of the lithium iron phosphate battery used underground in the coal mine is 100Ah, and the single-cell capacity is limited because the underground batteries in the coal mine are not allowed to be connected in parallel when in use. The unmanned vehicle is small in size and small in size in order to meet the limited roadway width in the pit and the use requirement of compactness and flexibility, but the explosion-proof requirement in the pit of the coal mine also enables the weight of the vehicle body to be large, and a single battery can only provide the endurance mileage of 4 hours.
The invention discloses a battery management system, an electric quantity control method and an electric quantity control system of an intelligent glasses, wherein the battery management system specifically comprises a battery pack and a power supply control module, the battery pack comprises a first battery and a second battery, the first battery and the second battery are connected in parallel to the power supply control module, the first battery is electrically connected with the power supply control module through a first circuit, and the second battery is electrically connected with the power supply control module through a second circuit; the impedance of the first circuit and the impedance of the second circuit are both smaller than 120mΩ. The battery management system can control and ensure stable power supply, and the electric quantity control method and the electric quantity control system can realize electric quantity stability and long-duration control. But the method is still based on the parallel connection of two batteries.
The unmanned vehicle under the mine adopts a use mode of switching power supply of two batteries, and the batteries are not used in parallel, so that the unmanned vehicle is one of methods for solving the problem of endurance mileage.
Disclosure of Invention
In order to solve the technical problems, the invention provides a vehicle power management system, which has the following technical scheme.
A vehicle power management system includes a power switching controller, a battery pack 1 and a battery pack 2, BMS1 and BMS2, and an external charge/discharge line;
during the discharge switching control of the battery pack 1 and the battery pack 2: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K2 is closed, the battery pack 1 is discharged, when the power supply switching controller detects that the electric quantity SOC of the battery pack 1 is smaller than or equal to a set value 1, the power supply switching controller sends an instruction, the BMS2 is closed to K4, the battery pack 2 starts to discharge, the BMS1 is disconnected to K2, the battery pack 1 stops discharging, and the starting switch is closed after the discharging of the battery pack 2 is completed;
when the battery pack 1 and the battery pack 2 are subjected to charge switching control: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K1 is closed, the battery pack 1 is charged, the power supply switching controller detects that the electric quantity of the battery pack 1 is equal to a set value 2, K1 is opened, the power supply switching controller sends out an instruction, the BMS2 is closed to K3, the battery pack 2 starts to be charged, and after the power supply switching controller detects that the electric quantity of the battery pack 2 is full and K3 is opened, a prompt that the battery is full is given, and the starting switch is closed.
Further, the set value 1 is 20%.
Further, the set value 2 is changed to 100%.
Furthermore, the power supply switching controller is a control board based on an ARM9 processor, is provided with two paths of CAN interfaces, CAN simultaneously carry out CAN communication with two battery packs, and controls the discharge or charge of the battery pack 1 or the battery pack 2.
Further, the starting switch is a mining flameproof signal switch, two groups of independent switch contacts are arranged in the starting switch, and after the starting switch is opened, the BMS1 and the BMS2 are electrified at the same time and can be communicated with the power supply switching controller.
Further, the BMS1 and the BMS2 are power management systems of the battery pack 1 and the battery pack 2, respectively.
Further, K1, K2, K3, K4 are 4 high-current contactors, K1, K2 are charge and discharge contactors of the battery pack 1, and K3, K4 are charge and discharge contactors of the battery pack 2.
Advantageous effects
1. The system has the functions of charge and discharge control and management, and can realize the switching management of two batteries and the overall management of a charger and electric equipment of a vehicle.
2. The system can realize autonomous switching of two groups of batteries, and when the electric quantity of one battery is insufficient, the system is actively switched to the other group of batteries for power supply, so that the system is reliable and convenient.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The technical scheme of the invention is further explained below with reference to the attached drawings.
As shown in fig. 1, a vehicle power management system includes a power switching controller, a battery pack 1 and a battery pack 2, BMSs 1 and BMSs 2, and an external charge/discharge line; BMS1 and BMS2 are power management systems of the battery pack 1 and the battery pack 2, respectively.
The set value 1 is set to 20%. The set value 2 is set to 100%.
The power supply switching controller is a control board based on an ARM9 processor, is provided with two paths of CAN interfaces, CAN simultaneously carry out CAN communication with two battery packs, and controls the battery pack 1 or the battery pack 2 to discharge or charge.
The starting switch selects the mining flameproof signal switch, and two groups of independent switch contacts are arranged in the starting switch, and after the starting switch is opened, the BMS1 and the BMS2 are electrified simultaneously and can communicate with the power supply switching controller.
The K1, K2, K3 and K4 are 4 high-current contactors, the K1 and K2 are charging and discharging contactors of the battery pack 1, and the K3 and K4 are charging and discharging contactors of the battery pack 2.
When used, the two cases are separated as follows.
1. During the discharge switching control of the battery pack 1 and the battery pack 2: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K2 is closed, the battery pack 1 is discharged, when the power supply switching controller detects that the electric quantity SOC of the battery pack 1 is smaller than or equal to a set value 1, the power supply switching controller sends an instruction, the BMS2 is closed to K4, the battery pack 2 starts to discharge, the BMS1 is disconnected to K2, the battery pack 1 stops discharging, and the starting switch is closed after the discharging of the battery pack 2 is completed;
2. when the battery pack 1 and the battery pack 2 are subjected to charge switching control: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K1 is closed, the battery pack 1 is charged, the power supply switching controller detects that the electric quantity of the battery pack 1 is equal to a set value 2, K1 is opened, the power supply switching controller sends out an instruction, the BMS2 is closed to K3, the battery pack 2 starts to be charged, and after the power supply switching controller detects that the electric quantity of the battery pack 2 is full and K3 is opened, a prompt that the battery is full is given, and the starting switch is closed.
The above embodiment is one of the preferred embodiments, and the claims of the present patent are the scope of protection.
Claims (5)
1. A vehicle power management system, characterized by: the battery pack comprises a power supply switching controller, a battery pack 1, a battery pack 2, BMS1, BMS2 and an external charging and discharging circuit; the BMS1 and the BMS2 are respectively changed into power management systems of the battery pack 1 and the battery pack 2;
during the discharge switching control of the battery pack 1 and the battery pack 2: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K2 is closed, the battery pack 1 is discharged, when the power supply switching controller detects that the electric quantity SOC of the battery pack 1 is smaller than or equal to a set value 1, the power supply switching controller sends an instruction, the BMS2 is closed to K4, the battery pack 2 starts to discharge, the BMS1 is disconnected to K2, the battery pack 1 stops discharging, and the starting switch is closed after the discharging of the battery pack 2 is completed;
when the battery pack 1 and the battery pack 2 are subjected to charge switching control: the power supply switching controller is communicated with the BMS1 and the BMS2 simultaneously, the starting switch is closed, the BMS1 and the BMS2 are electrified simultaneously, K1, K2, K3 and K4 are in an open state, K1 is closed, the battery pack 1 is charged, the power supply switching controller detects that the electric quantity of the battery pack 1 is equal to a set value 2, K1 is opened, the power supply switching controller sends out an instruction, the BMS2 is closed to K3, the battery pack 2 starts to be charged, and after the power supply switching controller detects that the electric quantity of the battery pack 2 is full and K3 is opened, a prompt that the battery is full is given, and the starting switch is closed;
the K1, K2, K3 and K4 are 4 high-current contactors, the K1 and K2 are charging and discharging contactors of the battery pack 1, and the K3 and K4 are charging and discharging contactors of the battery pack 2.
2. The vehicle power management system of claim 1, wherein the set point 1 is 20%.
3. The vehicle power management system of claim 1, wherein the set point 2 is 100%.
4. The vehicle power management system of claim 1, wherein the power switching controller is an ARM9 processor-based control board having a two-way CAN interface capable of CAN communication with both battery packs simultaneously and controlling discharge or charge of battery pack 1 or battery pack 2.
5. The vehicle power management system of claim 1, wherein the start switch is a mine flameproof signal switch having two independent sets of switch contacts therein, and wherein BMS1 and BMS2 are powered on simultaneously after the switch is turned on to communicate with the power switching controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310084390.4A CN116118528A (en) | 2023-02-07 | 2023-02-07 | Vehicle power management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310084390.4A CN116118528A (en) | 2023-02-07 | 2023-02-07 | Vehicle power management system |
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| Publication Number | Publication Date |
|---|---|
| CN116118528A true CN116118528A (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310084390.4A Pending CN116118528A (en) | 2023-02-07 | 2023-02-07 | Vehicle power management system |
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2023
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